panic while unmarshall (go-yaml/yaml issue #1050)

[pohly]

go-yaml/yaml#1050 applies to the fork:

package main

import (
	"fmt"

	yaml "sigs.k8s.io/yaml/goyaml.v3"
)

type SomeStruct struct {
	data string `yaml:"data"`
}

func main() {
	someStruct := SomeStruct{}

	var data = []byte{
		0x34, 0x30, 0x79, 0x3a,
		0x3a, 0x0d, 0x0d, 0x0d,
		0x0d, 0x0d, 0x0d, 0x0d,
		0x0d, 0x3c, 0x3c, 0x3a,
		0x0d, 0x0d, 0x0d, 0x0d,
		0x0d, 0x0d, 0x0d, 0x2d,
		0x20, 0x20, 0x2d, 0x20,
		0x23, 0x0d, 0x3f, 0x0d,
		0x23, 0x0d, 0x0d, 0x23,
		0x2d, 0x0d, 0x20, 0x2d,
		0x0d, 0x3f, 0x0d, 0x23,
		0x0d, 0x0d, 0x23, 0x2d,
		0x2d,
	}
	fmt.Printf("%q\n", string(data))

	yaml.Unmarshal(data, &someStruct)
}

"40y::\r\r\r\r\r\r\r\r<<:\r\r\r\r\r\r\r-  - #\r?\r#\r\r#-\r -\r?\r#\r\r#--"
panic: runtime error: hash of unhashable type []interface {} [recovered]
	panic: runtime error: hash of unhashable type []interface {}

goroutine 1 [running]:
sigs.k8s.io/yaml/goyaml%2ev3.handleErr(0xc00014de78)
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/yaml.go:294 +0x6d
panic({0x507f80?, 0xc00011c230?})
	/nvme/gopath/go-1.23.0/src/runtime/panic.go:785 +0x132
sigs.k8s.io/yaml/goyaml%2ev3.(*decoder).merge(0xc0001435e0, 0xc000150320, 0xc0001505a0, {0x509d20?, 0xc00011c120?, 0x4e76e5?})
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/decode.go:966 +0x1a5
sigs.k8s.io/yaml/goyaml%2ev3.(*decoder).mappingStruct(0xc0001435e0, 0xc000150320, {0x509d20?, 0xc00011c120?, 0xc00014db10?})
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/decode.go:950 +0x1065
sigs.k8s.io/yaml/goyaml%2ev3.(*decoder).mapping(0xc0001435e0, 0xc000150320, {0x509d20?, 0xc00011c120?, 0x46251e?})
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/decode.go:786 +0xa5
sigs.k8s.io/yaml/goyaml%2ev3.(*decoder).unmarshal(0xc0001435e0, 0xc000150320, {0x509d20?, 0xc00011c120?, 0x4d4385?})
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/decode.go:510 +0x3ea
sigs.k8s.io/yaml/goyaml%2ev3.(*decoder).document(...)
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/decode.go:527
sigs.k8s.io/yaml/goyaml%2ev3.(*decoder).unmarshal(0xc0001435e0, 0xc000150280, {0x509d20?, 0xc00011c120?, 0xc00014de78?})
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/decode.go:498 +0x28a
sigs.k8s.io/yaml/goyaml%2ev3.unmarshal({0xc00016c000, 0x31, 0x31}, {0x4fd8c0, 0xc00011c120}, 0x1?)
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/yaml.go:167 +0x396
sigs.k8s.io/yaml/goyaml%2ev3.Unmarshal(...)
	/nvme/gopath/src/k8s.io/kubernetes/vendor/sigs.k8s.io/yaml/goyaml.v3/yaml.go:89
main.main()
	/nvme/gopath/src/k8s.io/kubernetes/test2/main.go:33 +0x107
exit status 2